请教大全987 2

遥远的绿洲

2.         A 1972 agreement between Canada and the United States reduced the amount of phosphates that municipalities had been allowed to dump into the Great Lakes.

(A) reduced the amount of phosphates that municipalities had been allowed to dump

(B) reduced the phosphate amount that municipalities had been dumping

(C) reduces the phosphate amount municipalities have been allowed to dump

(D) reduced the amount of phosphates that municipalities are allowed to dump

(E) reduces the amount of phosphates allowed for dumping by municipalities

大全的答案是A,我错选了D.

我觉得选D是因为被允许到垃圾这个动作一致持续到现在,应该用一般现在时, 如果按照答案A,被允许到垃圾这个动作发生在 1972年之前, 感觉意思不对.

请教大家对这题的看法

遥远的绿洲

谢谢楼上提醒,查了一下0G11第62题,答案给的是D,又查了一下白勇语法,答案给的是A,这一下,彻底晕了.望牛牛们给一个说法吧.